Open the terminal on your system using ‘Ctrl + Alt+ t’ or through the application search bar as follows: All commands and steps in this article are performed on the Ubuntu 20.04 Linux system listed below. This article shows how to install Java 8 and Java 11 JDK and JRE on Ubuntu 20.04 using the terminal and how to switch between these two versions. Java is open source and has two flavors: the JDK (Java Development Kit), which is required if you want to develop Java applications, and the JRE (Java Runtime Environment), which is used to run Java applications and does not include compilers and development tools. Java applications are also used on game consoles and cell phones, for example, the Android operating system uses Java as an app programming language. It can be used to create server and desktop applications, and Java runs on almost all operating systems, including Mac OS, Windows, and Linux.
As a result, those packages have moved, and this will require changes to package imports.Java is the most widely used programming language.
Due to lack of browser support for Java plugins, the Applet API has been deprecated.The “var” keyword only affects local variables, and the Type Inference keeps you repeating the same text over and over again A developer-friendly keyword “var” was added to help to reduce boilerplate coding.This is very interesting for serverless-compute and one-offs in Kubernetes A REPL (read-eval-print-loop) tool, JShell, was added to support interactive programming, similar to what is available in Python.Modularization also enables code to be refactored for easier maintenance, through a self-describing collection of code, data, and resources. The introduction of modularity to better support scaling down to small computing devices.However, the biggest differences between Java 8 and Java 11 are: There are always a lot of little things that go into a release of Java, or any product for that matter.
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